Rear Torque Arms

A torque arm slides over the non-wire side of a hub motor's axle and engages the 10mm axle flats so the axle can't spin out of the dropout under power. It is recommended on any installation over about 500W, or on aluminum dropouts. These rear arms fit the 12 and 14mm threaded axles used by most Chinese hub motors.

Running regenerative braking? Regen pushes torque both ways, so use one of our Regen torque arms instead. See also Front and Splined arms, and the torque arm guide for installation and choosing the right model.